(Solved): Calculate the expected value, the variance, and the standard deviation of the given random variable ...

Calculate the expected value, the variance, and the standard deviation of the given random variable $$X$$. (Round all answers to two decimal places.) Thirty-one darts are thrown at a dartboard. The probability of hitting a bull's-eye is .1. Let $$X$$ be the number of bull's eyes hit. expected value variance standard deviation